The song is in Bb.    Here are the chords 

intro/Verse:
Bb                F               Eb                 Bb
i did my best to notice when the call came down the line
         F           Gm              Eb                F
upto the platform of surrender i was brought but i was kind
    Bb              F               Eb            Gm
and sometimes i get nervouse when i see an open door
           Eb                   F
close your eyes clear your heart   cut the chord

Chorus:
Bb         F  Gm          Bb
are we human    or are we denser
F          Gm   Eb            F
my sign is vital my hands are cold
        Bb     F                     Gm
and im on my knees looking for the answer
       Cm    Eb           Bb
are we human? or are we denser


bridge:
Eb                 F                F#m (open 5th optional)           Gm
will your system be alright when you dream of home tonight
     Eb                           F
ther is no message were recieving let me know is your heart still beating?